Olivia Wilde talks birthdays and weddings at SXSW

Olivia Wilde turns 29 years old tomorrow, and she is welcoming her last year before the big “3-0” with a bang.

E! News reported that Wilde spoke about the big birthday while promoting her film Drinking Buddies at the SXSW Film Festival.

"It's a big day tomorrow — a big day! It's the last year of my twenties,” Wilde said enthusiastically.

While ambiguous about her exact plans, Wilde teased that her festivities will be full of adventure.

"I am going to wreak havoc on the world," Wilde joked. "The world will not be the same.”

Wilde is particularly excited to reunite with fiancé Jason Sudeikis, who will meet her in Los Angeles to celebrate. According to People the couple have been engaged since January, and Wilde is radiating from romance.

"I'm so happy," she said. "There's nothing like it."

The pair has yet to set any concrete wedding plans.

Wilde says she has “no time to plan” the wedding. "Really no time," she admitted, "But I'm very lucky to be this busy."